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Ex 2.5,2 - Evaluate the products without multiplying directly - Ex 2.5

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Ex 2.5, 2 Evaluate the following products without multiplying directly: 103 107 103 107 = (100 + 3) (100 + 7) Using Identity (x + a) (x + b) = x2 + (a + b)x + ab, where x = 100 , a = 3, b = 7, = (100)2 + (3 + 7) 100 + (3) (7) = 10000 + (10)(100) + 21 = 10000 + 1000 + 21 = 11021

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.